Chemical Engineering MCQs

6108 MCQs  (Page 522 of 611)

Attempt Chemical Engineering Quiz
A standard test for determination of hardness in water is termed as ______________ test?
A. Edta
B. Electometric
C. Total count
D. Presumptive
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Removal of ______________ results from the disinfection of water?
A. Turbidity
B. Odour
C. Hardness
D. Bacteria
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Which of the following is not a natural source of air pollution ?
A. Volcanic eruptions and lightening discharges
B. Biological decay of vegetable matter
C. Photochemical oxidation of organic matter
D. None of these
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Which of the following is the most widely used disinfectant in water treatment ?
A. Chlorine
B. Irradiation of water by ultraviolet light
C. Cation exchanger
D. Coagulation
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There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth’s surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about _____________ °C/km?
A. 0.05
B. 1
C. 6.5
D. 15
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Threshold limit value (TLV) of CO in air is _____________ ppm?
A. 5
B. 50
C. 2000
D. 5000
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Ethanolamine is an absorbent used for the removal of _____________ from air/gas?
A. Hf
B. So2
C. H2s
D. Both b. & c.
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Which is the most efficient dust removal equipment for removal of submicronic dust particles from blast furnace gas ?
A. Packed scrubber
B. Gravity settling chamber
C. Electrostatic precipitator
D. Hydrocyclone
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Presence of nitrates in water in excess of 50 ppm causes________________?
A. Methemoglobinemia
B. Gastroenteritis
C. Asphyxiation
D. Tooth decay
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Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?
A. Low amount of excess combustion air
B. Large quantity of excess combustion air
C. Hydrocarbon fuel
D. Pulverised coal as fuel
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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